
Source: Wikimedia Commons
Eunectes notaeus
A large semi-aquatic boa endemic to the Paraguay River basin. Black saddles and blotches mark a yellow to golden-tan ground colour, and adults average 3.7 m. It is smaller than the green anaconda but still one of the world's largest snakes.
Eunectes notaeus is a boid endemic to the drainage of the Paraguay River and its tributaries in southern South America. Adults average 3.7 m in total length, with females larger than males and recorded to 4.6 m. Black or dark brown saddles, blotches and streaks overlay a yellow, golden-tan or greenish-yellow ground colour. It is semi-aquatic, favouring swamps, marshes and the brush-covered banks of slow-moving rivers and streams, and kills prey by constriction. Though smaller than the green anaconda, an adult is powerful, and keeping one demands a large land and water area, reliable heating, and the experience and extra hands to handle it safely.
Source: Wikipedia (CC BY-SA 4.0)
The Yellow Anaconda lives 15-20 years.
The Yellow Anaconda grows to Average 3.7m, females up to 4.6m.
They commonly weigh 25 to 35 kg, although specimens over 55 kg have been observed.
The ideal temperature for the Yellow Anaconda is 26〜33℃. Ideal humidity is 60〜70%.
Origin
The Paraguay River drainage of southern South America, from the Pantanal of Bolivia, Paraguay and western Brazil to north-eastern Argentina and northern Uruguay, in swamps, marshes and brushy banks of slow rivers
Sources: Reptiles Magazine: Yellow Anaconda Care Sheet / Wikipedia (English) / Reptile Database
Edited & verified by: BreederDirect editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Accepted name: Eunectes notaeus Cope, 1862
Synonyms: Eunectes wieningeri Steindachner, 1903, Epicrates wieningeri Steindachner, 1903
Authority databases: GBIF · Reptile Database
Nomenclature follows global taxonomic authority databases.
Listed on Appendix II as Boidae spp. since March 7, 1978 (Species+). As it is listed on Appendix II, no international endangered species certificate is required. Of the Anaconda genus, only the Giant Anaconda (Eunectes murinus) is designated as a specified animal under the Animal Welfare and Management Law Enforcement Decree, and this species does not apply.
Sources: CITES Appendices (Boidae spp., Appendix II, effective 7 March 1978) / IUCN Red List / Order for Enforcement of the Act on Welfare and Management of Animals, Appended Table
Regulations may change. Always verify the latest information with the relevant authorities.
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Lifespan
15-20 years
Size
Average 3.7m, females up to 4.6m
Temperature
26〜33℃
Humidity
60〜70%
Thawed frozen rats and rabbits
Keep the daytime basking spot at 32-33 C and let it fall to 30-31 C at night, with an ambient of 26-27 C. Hold humidity at 60-70 percent. Incorrect humidity brings respiratory disease and shedding problems, so PVC enclosures that balance ventilation and moisture retention suit this species better than screen-topped tanks.
Use an enclosure at least 180 cm long with both land and water areas, the land taking up two thirds and built for easy cleaning. Cypress mulch works well as substrate. The water must be deep enough for the snake to submerge, but it will defecate there, so plan for daily water changes and gravel-vacuuming from the outset.
In the wild it constricts birds, mammals, fish and reptiles around water. In captivity offer thawed frozen rats or rabbits sized to the snake. It is large and strong, so always feed with long tongs and never let it associate your hand with food.
Wary and capable of defensive behaviour. Keep it singly. Adults can weigh tens of kilograms, and it is considered safest to have more than one person present when handling.
The only Eunectes listed as a specified animal in the Appended Table of Japan's Act on Welfare and Management of Animals is the green anaconda, Eunectes murinus; this species is not covered. It nonetheless grows very large, so secure housing and support for its whole life before acquiring one. Listed on CITES Appendix II as Boidae spp. since 7 March 1978, so no registration certificate is required.
Advanced. This is an advanced-level species. It requires specialized equipment and advanced husbandry skills with precise environmental control.
The ideal temperature for Yellow Anaconda is 26〜33℃. Recommended humidity is 60〜70%. Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Yellow Anaconda is 15-20 years. With proper care and nutrition, they can live a long and healthy life.
Yellow Anaconda typically reaches Average 3.7m, females up to 4.6m as an adult. Size may vary depending on care conditions and individual genetics.
Yellow Anaconda feeds on: Thawed frozen rats and rabbits. Aim for a balanced diet with appropriate feeding frequency.
The price of Yellow Anaconda varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: September 17, 2026